There have never been particle counters quite like these: one switch, one display, quick results. At an unbeatable price. Just turn the lightweight counter on, check the display, and turn it off. Walk around a room, scan a filter, and watch the particle concentration readout change! Measuring filter effectiveness, checking clean room status, and troubleshooting contamination has never been this easy and fast.

If you need to monitor particle concentration, the Model 228 takes a six-second sample, then calculates and displays the concentration in particles per cubic foot (or particles per liter). If you need to monitor total particle count, the Model 229 displays the number of particles in 0.1 cubic feet of air after a one minute sample. Both counters detect discrete particles using a laser-based sensor. These counters weigh only 1.5 pounds. Their internal rechargeable batteries last for 8 hours. There are no complicated controls.

These counters have many uses: medical industries can monitor air filter systems for pathogen-sized particles. Filter manufacturers can test the effectiveness of their product. Clean room industries can perform quick status checks of Class 100 and above clean rooms. Heating, ventilation, and air conditioning personnel can determine indoor air quality by converting particle concentration to mass concentration.

Features:

 AC or battery operation

 Simple on/off operation

 Quick particle concentration readings (228)

 Total counts in 1 minute sample (229)

 Choose base sensitivity of 0.3 or 0.5 micron

 0.1 cfm (2.83 lpm) flow rate

 Rugged design for field use